Slope & Gradient Calculator

Convert between rise/run, percent, ratio (1 in N) and degrees.

Rise (vertical) (m)Run (horizontal) (m)

Gradient (%)

Ratio 1 in N

Angle (°)

Useful anchors: ramps for accessibility 1:12 (8.3%), sewers 1:60–1:100, road comfort limit ~8%, rail ~1–3%. Percent ≈ degrees×1.75 only for small angles.

Formula

% = rise/run×100; 1 in N = run/rise; θ = atan(rise/run)

References: Civil design gradients; accessibility codes

Slope & Gradient Calculator is a free slope calculator for surveyors, civil engineers and property buyers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.

About Slope & Gradient Calculator

Convert between rise/run, percent, ratio (1 in N) and degrees. The calculation implements % = rise/run×100; 1 in N = run/rise; θ = atan(rise/run) (Civil design gradients; accessibility codes). Useful anchors: ramps for accessibility 1:12 (8.3%), sewers 1:60–1:100, road comfort limit ~8%, rail ~1–3%. Percent ≈ degrees×1.75 only for small angles.

How to use Slope & Gradient Calculator

1Enter Rise (vertical) in m.
2Enter Run (horizontal) in m.
3Read Gradient, Ratio 1 in N, Angle instantly — no submit button needed.
4Need US units? Flip the SI/Imperial toggle and every field converts.

Why use Slope & Gradient Calculator?

✓Implements the standard formula — % = rise/run×100; 1 in N = run/rise; θ = atan(rise/run)
✓Reference cited on-page: Civil design gradients; accessibility codes
✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
✓Live worked example: the substitution recomputes from your numbers
✓Runs entirely in your browser — nothing uploaded, free forever

Frequently asked questions

What formula does the Slope & Gradient Calculator use?+

It computes % = rise/run×100; 1 in N = run/rise; θ = atan(rise/run), per Civil design gradients; accessibility codes. The formula is displayed under the result along with a worked example substituted with your own inputs.

What should I keep in mind when using this calculator?+

Useful anchors: ramps for accessibility 1:12 (8.3%), sewers 1:60–1:100, road comfort limit ~8%, rail ~1–3%. Percent ≈ degrees×1.75 only for small angles.

Are regional land units exact?+

Conversion factors follow state revenue-department values noted on the tool. Units like bigha and katha vary by region, so always confirm the local factor named in your land records.

Is the Slope & Gradient Calculator free to use?+

Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.

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